CN208038348U - A kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System - Google Patents
A kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System Download PDFInfo
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- CN208038348U CN208038348U CN201820264338.1U CN201820264338U CN208038348U CN 208038348 U CN208038348 U CN 208038348U CN 201820264338 U CN201820264338 U CN 201820264338U CN 208038348 U CN208038348 U CN 208038348U
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- propylene
- acrylonitrile
- ammoxidation
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- recovery system
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Abstract
The utility model is related to a kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery Systems,The system includes acrylonitrile preparation facilities connected in sequence,Acrylonitrile separator and propylene recovery unit,Propylene recovery unit includes the propylene enrichment plant being sequentially connected,Rich gas compression device,Lightness-removing column and propylene rectification tower,The propylene being discharged in gas from acrylonitrile separator can be enriched with by propylene enrichment plant,Obtain Rich propylene body,Rich gas compression device can compress the propylene after enrichment,It is allowed to be conducive to the separation of propylene and low fraction gas in lightness-removing column,Thus the propylene in Rich propylene body can further be purified,Propylene after purification is discharged through lightness-removing column tower reactor,And it is delivered in rectifying column,Propylene and propane can further be detached by the rectifying action of rectifying column,The purified propylene being discharged in rectifying column kettle liquid is higher,Thus it can further be recycled,To improve the utilization rate of propylene.
Description
Technical field
The utility model belongs to acrylonitrile preparing technical field, and in particular to a kind of ammoxidation of propylene acrylonitrile production and propylene
Recovery system.
Background technology
Ammoxidation of hydrocarbons unsaturated nitrile is a key areas of petroleum industry, wherein is given birth to using propylene ammmoxidation process
Production acrylonitrile has been achieved for important breakthrough.Since propylene ammmoxidation process raw material is cheap and easy to get, technological process is simple and product matter
Amount is preferable, therefore the production method has obtained extensive industrial applications.
The technological process of traditional propylene ammmoxidation process is：(1) propylene liguid and liquid ammonia are entered into propylene, ammonia evaporates
Device, then by after gasification propylene and ammonia mix and reacted into fluidized-bed reactor together with air, catalyst；
(2) product is delivered in chilling tower, in the dilute sulfuric acid sprayed in chilling tower and unreacted ammonia；It (3) again will be from chilling
The gas being discharged in tower is delivered to absorption tower, and the water that declines in absorption tower absorbs soluble product in product, it is other not
Solidifying gas is discharged from tower top, and air is discharged into after burning；(4) absorbing liquid is delivered in treating column and is refined, obtain product
Acrylonitrile.The catalyst that above-mentioned propylene ammmoxidation process uses is mainly Mo-Bi series catalysts and Sb series catalysts, is urged using above-mentioned
When agent, the yield of ammoxidation of propylene reaction is relatively low (being only 60% or so).It is more in recent years to improve the yield of product acrylonitrile
Using high-speed catalyst, selectivity (its selectivity 85% or so) of the reaction to acrylonitrile can be improved in high-speed catalyst,
And then improve the yield of acrylonitrile.But when using above-mentioned high-speed catalyst, the conversion ratio of propylene is relatively low in reaction raw materials, will be high
When air speed catalyst is applied to above-mentioned conventional propylene ammonia oxidation technique, on the one hand, lower conversion ratio makes in on-condensible gas
Propylene content is higher, and recycling profit is not carried out since prior art directly goes out unreacted propylene from absorbing tower top row
With, this necessarily lowers the utilization rate of reaction raw materials propylene, improve process costs, while industrial production capacity improves, it is economical
Benefit is not improved largely；On the other hand, a large amount of propane flammable gas are also contained in fixed gas, if propane is direct by combustion method
Processing, since propane is there are factors such as incomplete combustions, not only can also cause environmental pollution, can also waste a large amount of propane fuel gas
Body.
In consideration of it, how to be improved to the technological process of existing propylene ammmoxidation process, to improve the utilization of propylene
Rate, the recycling for reducing process costs, realizing propane gas, this is one urgently to be resolved hurrily to those skilled in the art
Technical barrier.
Utility model content
Therefore, the technical problem to be solved by the utility model is to overcome in the technique of existing propylene ammmoxidation process,
The utilization rate of propylene is low, process costs are high and defect that is not being recycled to propane, and then provides a kind of ammoxidation of propylene
Acrylonitrile production and Propylene Recovery System.
For this purpose, the technical solution that the application takes is,
A kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System, including acrylonitrile preparation facilities connected in sequence (1)
Further include the propylene recovery unit being connected with the acrylonitrile separator, the propylene recovery with acrylonitrile separator
Device includes the propylene enrichment plant (2) being sequentially connected, rich gas compression device (3), lightness-removing column (4) and propylene rectification tower (5), institute
The import for stating propylene enrichment plant (2) is connected with the outlet of the acrylonitrile separator.
The tower bottoms outlet of the propylene rectification tower (5) connects the import of the acrylonitrile preparation facilities (1), the propylene
The overhead gas outlet connection propane storage device (6) of rectifying column (5).
The system also includes burning facility (7), import respectively with the outlet of the propylene enrichment plant (2) and described
The top gaseous phase outlet connection of lightness-removing column (4).
The acrylonitrile preparation facilities (1) is fixed bed reactors or fluidized-bed reactor.
The acrylonitrile separator includes the chilling tower (8) being sequentially connected, absorption tower (9) and acrylonitrile rectifying column
(10), the import of the chilling tower (8) connects the outlet of the acrylonitrile preparation facilities (1), the tower overhead gas of the absorption tower (9)
Body outlet connects the import of the propylene enrichment plant (2), and the tower reactor liquid outlet of the absorption tower (9) connects the acrylonitrile
Rectifying column (10).
The propylene enrichment plant (2) is PSA devices.
The rich gas compression device (3) is rich gas compressor.
The propane storage device (6) is propane storage tank.
Technical solutions of the utility model have the following advantages that：
1. ammoxidation of propylene acrylonitrile production provided by the utility model and Propylene Recovery System, including propylene connected in sequence
Nitrile preparation facilities and acrylonitrile separator further include the propylene recovery unit being connected with acrylonitrile separator, the propylene
Retracting device includes the propylene enrichment plant being sequentially connected, rich gas compression device, lightness-removing column and rectifying column, propylene enrichment plant
Import is connected with the outlet of acrylonitrile separator, and in the system, propylene enrichment plant can will be arranged from acrylonitrile separator
The propylene gone out in gas is enriched with, and Rich propylene body is obtained, and then reduces the outer propylene amount drained into air, then by richness third
Alkene gas is delivered in rich gas compression device, and rich gas compression device can compress the propylene after enrichment, improve its pressure, make
The separation for being conducive to propylene and low fraction gas in lightness-removing column, thus the propylene in Rich propylene body can further be purified,
Propylene after purification is discharged through lightness-removing column tower reactor, and is delivered in rectifying column, due to containing a large amount of third in lightness-removing column kettle liquid
Propylene and propane can further be detached by the rectifying action of rectifying column, be discharged in rectifying column kettle liquid by alkene and propane
Purified propylene is higher, thus can further recycle it, to improve the utilization rate of propylene, reduces process costs.
2. ammoxidation of propylene acrylonitrile production provided by the utility model and Propylene Recovery System, by the overhead gas of rectifying column
Thus connection propane storage device in outlet can realize the recycling of propane combustion gas, also can avoid making when propane incomplete combustion
At the defect of environmental pollution.
3. ammoxidation of propylene acrylonitrile production provided by the utility model and Propylene Recovery System, further include burning facility,
It exports and connects with the overhead gas of enrichment plant and lightness-removing column respectively, thus can will arrange outside enrichment plant and lightness-removing column tower top
Gas outer row after burning, to reduce the pollution to environment.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is the ammoxidation of propylene acrylonitrile production and Propylene Recovery System that the utility model embodiment 1 provides；
Wherein, reference numeral is as follows：
1- acrylonitrile preparation facilities；2- propylene enrichment plants；3- rich gas compression devices；4- lightness-removing columns；5- propylene rectification towers；
6- propane storage devices；7- burning facilities；8- chilling towers；The absorption towers 9-；10- acrylonitrile rectifying columns.
Specific implementation mode
The technical solution of the utility model will be clearly and completely described below, it is clear that described embodiment is
The utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without making creative work belongs to the utility model protection
Range.In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
Ammoxidation of propylene acrylonitrile production provided in this embodiment and Propylene Recovery System, including, acrylonitrile connected in sequence
Preparation facilities 1, acrylonitrile separator and propylene recovery unit, in the present embodiment, acrylonitrile preparation facilities 1 are that fixed bed is anti-
Device is answered, in other embodiments, acrylonitrile preparation facilities 1 or fluidized-bed reactor, propylene and oxygen, ammonia can be in this realities
It applies in the acrylonitrile preparation facilities 1 of example offer and carries out ammoxidation reaction.
Acrylonitrile separator in the present embodiment includes the chilling tower 8 being sequentially connected, absorption tower 9 and acrylonitrile rectifying column
10, acrylonitrile separator is the device for handling the product of ammoxidation reaction, import and the acrylonitrile system of chilling tower 8
The outlet of standby device 1 is connected, and first, the product after the reaction of acrylonitrile preparation facilities 1 is delivered in chilling tower 8,
Product after dilute sulfuric acid in chilling tower 8 can react acrylonitrile preparation facilities 1 is washed to remove unreacted ammonia,
Then 8 kettle liquid of chilling tower is delivered in absorption tower 9 and is washed, absorption tower 9 obtains gas phase and liquid phase, the present embodiment after washing
Liquid phase after washing is delivered to by the tower reactor liquid on absorption tower 9 in acrylonitrile rectifying column 10, and in acrylonitrile rectifying column 10
In carry out being refining to obtain product acrylonitrile, by the gas phase after washing by the overhead gas on absorption tower 9 be delivered to propylene recovery dress
Set the middle recycling enrichment for carrying out propylene.
Propylene recovery unit in the present embodiment includes the propylene enrichment plant 2 being sequentially connected, rich gas compression device 3, takes off
Light tower 4 and propylene rectification tower 5, and the import of propylene enrichment plant 2 is connected with the outlet of acrylonitrile separator, rectifying column 5
Tower bottoms outlet connection acrylonitrile preparation facilities 1 material inlet, the propylene enrichment plant 2 in the present embodiment is specially PSA
Device, rich gas compression device 3 are specially rich gas compressor, and the gas phase that the present embodiment obtains after washing absorption tower 9 initially enters
In propylene enrichment plant 2, to be enriched with to the propylene in gas phase, Rich propylene body and poor propylene gas are obtained, by the richness third
Alkene gas is delivered in rich gas compression device 3 and is pressurized, then by Rich propylene body after supercharged be delivered in lightness-removing column 4 into
The separation of propylene and low fraction gas is realized in row rectifying by lightness-removing column 4, thus can be further by the propylene in Rich propylene body
Purification, the propylene after purification is discharged through 4 tower reactor of lightness-removing column and is delivered in rectifying column 5, big due to containing in lightness-removing column kettle liquid
The propylene and propane of amount can further be detached propylene and propane by the rectifying action of rectifying column 5,5 kettle liquid of rectifying column
The purified propylene of middle discharge is higher, can return it to original of the material inlet as ammoxidation reaction of acrylonitrile preparation facilities 1
Material carries out ammoxidation reaction with oxygen, ammonia, it is thus achieved that the further recycling of propylene, to improve the profit of propylene
With rate, process costs are reduced；5 overhead gas of rectifying column can transport into propane storage device 6, thus can realize propane combustion gas
Recycling, also can avoid causing the defect of environmental pollution when propane incomplete combustion.
Ammoxidation of propylene acrylonitrile production system in the present embodiment further includes burning facility 5, and import is rich with propylene respectively
Collect the outlet of equipment 2 and the top gaseous phase outlet connection of lightness-removing column 4, since propylene has obtained a large amount of recycling in above system, by
This can be by the low fraction of the top gaseous phase outlet discharge of the poor propylene gas of the outlet discharge of propylene enrichment plant 2 and lightness-removing column 4
Thus gas outer row after burning facility 5 can reduce the burning of lightness-removing column top gaseous phase and propylene enrichment plant discharge gas
Pollution to environment.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
Among the protection domain that variation is created still in the utility model.
Claims (8)
1. a kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System, including acrylonitrile preparation facilities connected in sequence (1) and
Acrylonitrile separator, which is characterized in that further include the propylene recovery unit being connected with the acrylonitrile separator, it is described
Propylene recovery unit includes the propylene enrichment plant (2) being sequentially connected, rich gas compression device (3), lightness-removing column (4) and propylene rectifying
The import of tower (5), the propylene enrichment plant (2) is connected with the outlet of the acrylonitrile separator.
2. ammoxidation of propylene acrylonitrile production according to claim 1 and Propylene Recovery System, which is characterized in that the propylene
The tower bottoms outlet of rectifying column (5) connects the import of the acrylonitrile preparation facilities (1), the tower top of the propylene rectification tower (5)
Gas vent connects propane storage device (6).
3. ammoxidation of propylene acrylonitrile production according to claim 2 and Propylene Recovery System, which is characterized in that the system
Further include burning facility (7), the import tower top with the outlet and the lightness-removing column (4) of the propylene enrichment plant (2) respectively
Gaseous phase outlet connects.
4. ammoxidation of propylene acrylonitrile production according to claim 3 and Propylene Recovery System, which is characterized in that the propylene
Nitrile preparation facilities (1) is fixed bed reactors or fluidized-bed reactor.
5. according to claim 1-4 any one of them ammoxidation of propylene acrylonitrile productions and Propylene Recovery System, which is characterized in that
The acrylonitrile separator includes the chilling tower (8) being sequentially connected, absorption tower (9) and acrylonitrile rectifying column (10), the urgency
The import of cold tower (8) connects the outlet of the acrylonitrile preparation facilities (1), the overhead gas outlet connection of the absorption tower (9)
The tower reactor liquid outlet of the import of the propylene enrichment plant (2), the absorption tower (9) connects the acrylonitrile rectifying column
(10)。
6. ammoxidation of propylene acrylonitrile production according to claim 5 and Propylene Recovery System, which is characterized in that the propylene
Enrichment plant (2) is PSA devices.
7. ammoxidation of propylene acrylonitrile production according to claim 6 and Propylene Recovery System, which is characterized in that the rich gas
Compression device (3) is rich gas compressor.
8. ammoxidation of propylene acrylonitrile production according to claim 2 and Propylene Recovery System, which is characterized in that the propane
Storage device (6) is propane storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201820264338.1U CN208038348U (en) | 2018-02-23 | 2018-02-23 | A kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820264338.1U CN208038348U (en) | 2018-02-23 | 2018-02-23 | A kind of ammoxidation of propylene acrylonitrile production and Propylene Recovery System |
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| CN208038348U true CN208038348U (en) | 2018-11-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038486A (en) * | 2019-04-30 | 2019-07-23 | 江苏金通灵流体机械科技股份有限公司 | A kind of petroleum industry tail gas pressurization recovery system |
-
2018
- 2018-02-23 CN CN201820264338.1U patent/CN208038348U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110038486A (en) * | 2019-04-30 | 2019-07-23 | 江苏金通灵流体机械科技股份有限公司 | A kind of petroleum industry tail gas pressurization recovery system |
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